Suspended roof and end wall construction for reverberatory furnace

ABSTRACT

A refractory furnace construction is provided with a panelized roof using a hooked-on post or gooseneck type of suspension, as distinguished from a so-called piggy-back or cantilevered type. Each roof panel comprises a group of refractory tile members and their hanger castings constructed for unitized mounting within the roof construction. In addition to supporting metal structural framework, a cover assembly is provided to enable cleaning the upper surfaces of and, if desired, to provide a continuous cooling of the upper reaches of the refractory tile members of the roof. Refractory side wall parts converge towards each other and cooperate with a nose part to enclose an uptake end of the furnace. The nose part is constructed for unitized removal and insertion with respect to the side wall parts.

United States Patent 1191 Longenecker [45] F b, 5, 1974 SUSPENDED ROOF AND END WALL CONSTRUCTION FOR REVERBERATORY rimary Examiner-Kenneth W. Sprague FURNACE Attorney, Agent, or Firm-Parmelee, Miller, Welsh & [76] Inventor: Levi S. Longenecker, 61 Mayfair Kratz Dr., Pittsburgh, Pa. 15228 S C [22] plied: 1972 A refractory furnace construction is provided with a [21] Appl. No.2 319,625 panelized roof using a hooked-on post or gooseneck ty e of suspension, as distinguished from a so-called Related Apphcatlon Data piggy-back or cantilevered type. Each roof panel com- [62] of 1821409 SePt- 1971- prises a group of refractory tile members and their hanger castings constructed for unitized mounting [52] US. Cl. 110/1 A, 1 10/99 R within the construction In addition to supporting [51] ll lt. Cl. F23!!! 5/04 meta] Structural framework a cover assembly is [58] Flew Search 1 10/1 99 R; 432/247, 252 vided to enable cleaning the upper surfaces of and, if I desired, to provide a continuous cooling of the upper [56] References C'ted reaches of the refractory tile members of the roof. Re-

UNITED STATES PATENTS fractory side wall parts converge towards each other 2,720,850 10 1955 Lanyon 110 99 and cooperate with nose P to enclose an uptake 3,045,616 7/1962 Reich 110/99 end of the furnace. The nose part is constructed for 3,240,173 3/1966 Bunge 110/99 unitized removal and insertion with respect to the side 3,315,950 4/1967 Potocnik et al llO/l X wall parts. I 3,328,014 6/1967 Longenecker llO/99 X 3,345,962 10/1967 Longenecker 110/99 7 Claims, 42 Drawing Figures PATENTEU 5'974 3.789.780

SHEET 1110f 10 PATENTEDFEB 51914 I 3.789.780

SHEEI OZUF 10 PATENTEDFEB W 3.789.780 sum 030F 10 PATENTEDFEB 5mm 3,789,780

' SHEET MOP-1o PAIENTEUFEB 51914 3.789.780 SHEET USUFTO Fig.19

PATENTED 51W 3,789,780

SHEET OBUF 10 PAIENTEU 5W4 3,789,780

sum O'IUF 1o,

CROSS REFERENCE TO RELATED APPLICATIONS I This is a divisional of application Ser. No. 182,409, filed Sept. 21, 1971.

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention pertains to a new and improved roof suitable for refractory furnaces, such as used in the refining of copper, and to an improved roof construction that utilizes a so-called gooseneck type of suspension and that will facilitate construction, patching, cooling and cleaning of its refractory tile members. A phase of the invention relates to a refractory wall and nose construction that may be utilized with the furnace.

2. Description of the Prior Art In my earlier US. Pat. No. 3,589,316, I disclosed a furnace roof construction which utilizes a cantilever or piggy-back type of suspension which has many advantageous features. The present invention deals with providing advantageous and improved features in a socalled gooseneck suspended type of furnace roof and to an improved furnace wall and nose construction that may be used therewith.

SUMMARY OF THE INVENTION It has thus been an object of the present invention to devise an improved panelized roof and wall construction for furnaces using a so-called gooseneck or vertical hanger post suspension.

Another object of the invention has been to make practical a pendulum-like suspension for a panelized refractory tile member assembly that will facilitate furnace construction and repair.

Another object of theinvention has been to devise a furnace nose construction which, as assembled, may be inserted and removed without disturbing other parts of a wall assembly for which it serves as a connecting unit.

A further object of the invention has been to provide a panelized refractory wall construction which may have radially connected parts and which will utilize socalled keyhole tile members for facilitating its construction and repair.

These and other objects of the invention will appear to those skilled in the art from the illustrated embodi- 'ments and the claims.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings,

FIG. 1 is a top plan view illustrating a furnace constructed in accordance with an embodiment of the invention.

FIG. 2 is a side section in elevation on the scale of and taken along the line IIII of FIG. 1; this view is taken longitudinally of the furnace construction.

FIG. 3 is an enlarged transverse section in elevation taken along the line III-III of FIG. 1 and illustrating a so-called radially sloped type of side hip.

FIG. 4 is a further .enlargedfragmental transverse view in elevation illustrating a stepped type of furnace side hip.

FIG 5 is a side view in elevation of intermediate scale taken between a pair of overhead cross-extending and longitudinally spaced-apart girders of the roof framework construction, illustrating how assembled panel units are suspended from and between a pair of girder members.

FIG. 6 is a top plan view on the scale of and of the panelized structure shown in FIG. 5.

FIG. 7 is an end view in elevation and FIG. 8 is a side view in elevation on the same scale, showing a complete panel assembly which has four rows of refractory tile members in a banded relation and supported by two rows of hanger castings that are, in turn, carried or suspended by a gooseneck hanger and its cross extending support channel.

FIG. 9 is a top plan view on the scale of and of the panel assembly of FIGS. 7 and 8.

FIGS. 10 and 11 are greatly reduced somewhat diagrammatic views illustrating procedure that may be employed in mounting and dismounting a unitized panel such as illustrated in FIGS. 7 to 9, inclusive.

FIG. 12 is a greatly enlarged side view and FIG. 13 is an end view in elevation showing the construction of hanger castings used in the furnace roof.

FIG. 14 is an isometric view in elevation showing a typical refractory roof tile which may be of basic or magnesite chromium construction and which is shown used in the panelized construction of FIGS. 7, 8 and 9.

FIGS. 15 and 16 are isometric views in elevation on the scale of FIG. 14 illustrating metal shields or plates that may be employed between the tile members. The I face plate of FIG. 15 which may be of steel is a preferabletype in that it utilizes intermediate-positioned and inwardly extending lugs or knobs of the hanger castings for its suspension; the construction of .FIG. 16 is a simplified type that may be used, for example, where the replacement of bumt-out tile members is to be accomplished in the roof construction.

FIG. 17 is a perspective view which shows tile and metal plate members in an exploded relationship to illustrate how they may be assembled in constructing a typical four tile member assembly for each hanger castmg.

FIG. 18 is a transverse view in elevation of a furnace roof construction on the scale of and corresponding to FIG. 3, but particularly illustrating a permanent air supplying manifold or duct and cover plate construction that may be employed inaccordance with the invention.

FIG. 19 is a fragmental side sectional view in elevation on the scale of and taken along the line XIX-XIX of FIG. 18.

FIG. 20 is an enlarged fragmental side sectional view in elevation showing baffling or an enclosing plate con-- struction for the furnace roof and a method of tying opposed rows of hanger castings together with respect to an associated gooseneck hanger (see also FIGS. 7 and 8). This view is taken along the line XX-XX of FIG. 21.

FIG. 21 is a transverse section on the scale of FIG. 20 and taken along XXIXXI thereof.

FIG. 22 is a fragmental top plan view on a reduced scale of the construction of FIGS. 20 and 21 and taken in the' same longitudinaldirection as FIG. 20.

FIG. 23 is a slightly enlarged fragmental side view in elevation and partial section showing further details of theconstruction of FIG. 20.

FIG. 24 is a transverse end view in elevation across a furnace showing a modified type of air supply and ductwork arrangement; it illustrates a hinge-mounted cover construction which is suitable for cleaning the upper reaches of refractory tile members by means of pairs of blow lances. When the furnace is in operation, the cover members will be retained in the upper dot and dash positions and will be lowered to their full line positions when a blow-cleaning operation is to be conducted.

FIG. is an enlarged fragmental section in elevation taken along the line XXV-XXV of FIG. 24.

FIG. 26 is a vertical section on the scale of and taken along the line XXVI-XXVI of FIG. 24 and FIG. 27 is a vertical section taken along the line XXVIIXXVII of FIG. 24.

FIG. 28 is an isometric view in elevation showing a hanger casting and its associated tile members that are suspended thereby and which may form or provide an assembly for use in replacing burnt-out members in a roof construction. It will be noted that this assembly is provided with its own tile banding steel strap or strip and when a group of such assemblies are used, the banding strips will be staggered; in an initial installation, the construction shown in FIGS. 7 and 8 may be used wherein the banding strip surrounds all the tile members of a panel unit.

FIG. 29 is an exploded isometric view on the scale of FIG. 28 showing a slightly modified type of unit construction wherein the tile members are carried in pairs and the hanger casting is made in two interfitting interlatching parts. This form further facilitates repair of a furnace and is particularly suitable for roof end panel work.

FIG. 30 is an enlarged side view in elevation ofa roof patching or repair panel unit showing a side-positioned expansion steel plate therefor.

FIG. 31 is an end view in elevation on the scale of the repair panel unit of FIG. 30 showing an end-positioned expansion steel plate therefor.

FIG. 32 is a top plan view on the scale of and showing the panel unit of FIGS. 31 and 30.

FIG. 33 is an exploded view in elevation showing how an asbestos heat shield of rectangular shape may be used with a four-tile bundle to accommodate for hot patching.

FIG. 34 is an end or transverse section on the scale of and taken along the line XXXlV-XXXIV of FIG. 33.

FIG. 35 is a horizontal section illustrating the construction of nose and side wall parts that may be used for the exhaust manifold or duct illustrated in FIG. I;' this construction may be used to form the vertical reaches of the pants-leg shaped duct.

FIG; 36 is a side view in elevation on the scale and of the construction of FIG. 35, showing the inner or refractory tile side of the wall and nose parts.

FIG. 37 is a fragmental horizontal view andFIG. 38 is a fragmental vertical view showing details of the construction of the nose part of FIGS. 35 and 36.

FIG. 39 is a slightly enlarged vertical side section in elevation on the scale of and taken along the line And FIG. 42 is a horizontal section on the scale of FIGS. 39 to 41, taken along the line XLII--XLII of FIG. 36.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring particularly to FIGS. 1 to 9, inclusive. I have shown a representative overall reverberatory furnace A of a so-called suspended basic roof type that may utilize magnesite-chrome chemically bonded or magnesia-coated .oxide, directly bonded tile or refractory brick members 25 to form a panelized suspended roof construction. FIG. 3 illustrates a furnace having a radial sloping type of side hip B which terminates in a vertically extending wall part D. FIG. 4 illustrates an alternate stepped type of side hip construction B. In FIGS. 1 and 3, K represents a pair of longitudinally extending conveyors and L represents feed hoppers leading down from the conveyors for supplying charging metals to the furnace A.

The roof of the furnace A is shown made up of as- I sembled panels or panel units C (see FIGS. 7 and 8) consisting of refractory tile members 25 in four row groups that are supported by opposed pairs of metal hanger castings 20. As shown in FIG. 7, each row of hanger castings 20 carries a pair of tile member rows. It will be noted from FIG. 3 that tile and casting member rows of each panel C extend transversely of the furnace and that the narrow side faces of the tile members 25 face longitudinally of the furnace. Each row of hanger castings 20 of the row pairs of each panel C is carried and suspended from an associated side flange of a transversely extending, upwardly open, metal support channel 15 (see FIG. 7). Each channel 15 is suspended in a pendulum-like fashion by an associated gooseneck, hook-nose or L-shaped vertical post hanger or member 12 that, at its lower end, has a wing mount-.

ing member 14 secured thereto and projecting therefrom. Each wing member 14 has a bottom flange 14a that is secured within the web of the channel 15 by bolt and nut assemblies 14b.

The post hanger 12 (see also FIG. 9) has a mounted position such that the panel C is suspended in a balanced relationship from an overhead metal I-beam girder member 10. It will be noted in FIGS. 7 to 9 that each gooseneck hanger 12 has a pair of vertically extending, angle-shaped members 12a that are secured together by bolt and nut assemblies 12b and, at their lower end, receive the wing mounting member 14 therebetween. As shown in FIG. 7, spacers are p0- sitioned between the pair of angle pieces or members 12a, so that they may be bolted together evenly and without distorting them. A horizontally forwardly extending metal latch member 13 is adapted to removably latch over an upper flange of a cooperating or associated I-beam support member 11 that extends longitudinally of the furnace A and, in turn, is carried on the bottom flanges of a pair of cross-extending I-beam girders 10. The hook member 13, like the wing member 14, extends between the two angle pieces 12a of the gooseneck hanger 12 and is secured therebetween by the bolt and nut assemblies 12b.

In order to provide a panel unit C that will have its hanger castings 20 and suspending gooseneck post or hanger 12 fully assembled and retained in such a relation for palletizing a pair of them on a common pallet for handling, shipping, etc., and for subsequent mounting as a panel unit in a furnace, the rows of refractory tile members 25 which in the construction shown comprise four rows, are shown banded together by a steel banding strap or strip 35 about their outer reaches. It is also desirable to provide a wire tie 40 which is shown looped about the hanger castings 20 of each panel assembly C to hold them in a secured assembled relation on their associated suspension channel member 15. As shown in FIG. 8, the ends of the wire loop 40 may be twisted together at 40a. An end portion of loop 40 is shown secured, as by welding to an angle bracket 41. As shown in FIG. 20, the bracket 41 is adapted to be removably secured at its top flange to the web portion of an associated channel by a pair of nut and bolt assemblies 42.

Referring particularly to FIGS. 1 to 6, inclusive, it will be seen that each panel assembly C is suspended in pendulumlike fashion from and slidably adjustable along an associated overhead, longitudinally extending beam 11. As shown, the beams 11 have a transversely spaced-apart relation with respect to each other, see particularly FIG. 3, and each is constructed to support or suspend a group of hanger casting and tile member panels C therealong. Each base member 11 is mounted between and transversely, slidably, along outwardly extending bottom flanges of a longitudinally spaced-apart pair of adjacent cross-extending overhead girders 10 that contribute primary overhead members of the metal framework. The girders l0 are, in turn, secured at their ends to vertical buckstays 9.

FIGS. 10 and 11 are illustrative of how a panel C which has a greater length than width, for. example, four by two feet may be mountedin or removed from the roof construction. A panel C may be inserted lengthwise between a pair of support channel members 11 and moved downwardly from position (1) to position (2) below such members. The panel C may then members 25. Each leg e also has an inwardly projecting, intermediately positioned lug, knob, boss or side projecting portion 211' that is adapted to rest in a top end slot or notch 28 of an associated tile member 25. Central or intermediate leg 20d also has a crossextending bottom foot portion 20f and a pair of intermediately positioned, horizontally extending lug, knob, boss or side projection portions 28 which are adapted to cooperate with the corresponding, aligned lugs 20i of the end or side legs 20e in engaging within top recesses or slots 28 of the tile members 25. The lugs 20: and 20h may also provide a'metal support (see FIG. 17) for a top flange 301: of a steel face plate of FIG. 15. It will be noted from FIG. 13 that the leg and foot portions of each hanger casting 20 define an inverted T- shape.

be turned at right angles to extend crosswise of the members 11, as indicated by position (3) of FIGS. 10 and 11, and then moved to an aligned position with respect to an associated support member 11. The hook portion 13 of its gooseneck 12 will then be engaged over the upper flange of the member 11 to suspend the panel C as indicated by position (4). To remove the panel C, the operation is reversed. The manipulation may be effected by using an overhead hoist, as engaged within an eyelet portion 13a of the hook 13 (see FIG. 18).

FIGS. 12, 13 and 17 show the construction of the hanger castings 20. These castings, as indicated, are employed to support or carry a banded group of tile or brick members 25 in a manner such as illustrated in FIGS. 7, 8, 28 and 29. Each hanger 20 has a centrally disposed vertical hook portion 20a which is adapted to latch-over an adjacent upwardly projecting side flange of an associated support channel member 15. The hook portion 20a is carried by a horizontally extending shoulder portion 20b which, at its ends, has a pair of upwardly projecting lugs 20: and 200' to serve as positioning means for ductwork or cover plate members.

In addition, the shoulder portion 20b carries a group of three, downwardly or forwardly extending tile member supporting legs 20d and 202. Each side leg- 202 has a transversely extending foot portion 20g at its lower or forward end that is adapted to, as shown in FIG. 17 taken in view of FIG. 14, engage within notch or slot portions 26 of .a pair of back-to-back positioned tile Referring particularly to FIGS. 14 and 17, refractorytile members 25 ofa basic type are shown provided with opposed wide side faces 25a and 25b, with opposed narrow side faces 25c, and with top and bottom or end faces 25d and 25e. The faces are shown as planar to define a rectangular-shaped tile member. Each tile member 25 has a horizontally cross-extending latching slot or recess 26 adjacent the upper end or top face 25d that extends between and is open to opposite wide side faces 25a and 25b that is open fully along an associated narrow side face 25c. A vertical latching slot recess 27 extends upwardly from an associated horizontal slot 26 at one end thereof, along one wide side face 25a. Each vertical extending slot 27 extends upwardly from an associated slot 26 and is open to the top end face 25d and to a top or upper end slot or recess I 28. The slots 26, 27 and 28 provide latching assemblies on each narrow side face 250 and are shown of the same construction.

FIG. 17 illustrates how the feet and leg portions of a hanger casting member 20 are adapted to be positioned within the slotted or recessed portions of each tile member 25. It will be noted that each hanger 20 is constructed to accommodate the mounting of two pairs of tile members 25. This figure also illustrates how the second group of tile members 25 may be mounted in position, utilizing steel face plate or shielding separator members 30 (see also FIG. 15). As shown, the separator members 30 are adapted to be applied in-one direc tion to individual tile members 25 of a banded group to serve as a single'layer between wide side faces of a pair of adjacent tile members 25. Overlapping or top flange 300 of each member 30, in addition to resting on a portion of the top face 25d of an associated tile member 25, may have a greater width than the spacing between end slots 28 along one side face 25a of a tile member 25 for support by the intermediate lugs 20h and 201' of the hanger castings 20in a metal-to-metal contacting relation. Neck portion 30b bypassesthe feet portions 20g and 20f of the hanger casting20 and bent-over upright or vertical side flange portion 30a is adapted to fit over and enclose a narrow side face 250 of a tile member 25. The flanges 30a thus also provide spacers between end faces of adjacent tile members 25, and main body portions of each face plate 30 serve as separating means between wide side faces of a pair of adjacent tile members 25. FIG. 16 shows a shielding separating member 30' whose side wing portion 30a slopes at its upper edge into neck portion 30b. The edges of the neck portion 30b slope upwardly in a centrally conveying manner to a central top tab portion 30c that is adapted to rest on the top face 25d of a tile member 25. The shield 30 of FIG. 16 may be used in patching a roof construction.

FIG. 28 shows a basic bundle construction G of four tile members, as carried by an individual hanger casting 20. Such a bundle may be used in forming a panel and, in which event, a metal banding strap or strip 35 will be used about the refractory tile members 25 of the panel, see FIG. 8, and will be staggered as shown in FIG. 23.

In FIG. 29, essentially the same arrangement is effected as in FIG. 28, except that half (two tile) bundles H and I are provided which are individually secured together by steel straps or bands 35 and in a staggered relation, in order that they may interfit closely with respect to each other. To enable such a two-tile assembly to be supported as one hanger casting assembly, the hanger .l is formed of two parts 37 and 38 which are substantially of the same construction as the unitary of single-piece hanger of FIG. 28 as far as its feet and leg portions, its shoulder and projecting portions are concerned. However, the central leg portion is, in effect, split in half at the shoulder portion. The half or part 38 has a horizontally extending reinforcing web portion 380 that terminates at its end in a slot or hook portion 38b. On the other hand, part 37 at the inner end of its shoulder is provided with an upwardly projecting triangular-shaped latching lug 37b that is adapted to be engaged by the hook portion 38b of the part 38. When the engagement is effected, then the two parts 37, 38 act as a unit and are suspended by upwardly projecting, triangular-shaped latching hook portion 37a of the part 37.

FIGS. 30 to 32, inclusive, are illustrative of a modified panel construction that is particularly suitable for patching purposes. This construction is adapted to be carried into position by an overhead hoist-engaging gooseneck hanger 12 or other suitable form of hanger. As shown, each opposite wide side of the panel is provided with a pair of triangular-shaped steel plate members 77 that are adapted to be positioned along the narrow side faces of the tile members of the panel. A pair of triangular-shaped steel end plate members 78 are also adapted to be positioned against the wide side faces of tile members 25 at each narrow end of the panel. As shown in FIGS. and 31, the end pieces or members 78 have bent-over portions adapted to overlap the sides of the assembly. Also, tie wires 79 are secured about the outer reaches of the panel assembly and extend through holes in the pair of side members 77 and the pair of end members 78 and are shown provided in FIG. 30 with tightening loops 79a. FIG. 32 shows the overall construction wherein an asbestos liner 78 extends in a continuous manner about the outer reaches of the panel and is held in place by the outer steel plate members 77 and 78.

In FIGS. 33 and 34 a boxlike or rectangular-shaped asbestos enclosure 75 is illustrated which may be used to enclose a basic group of four hanger-mounted tile members 25, such as shown in FIG. 33. The boxlike enclosure 75 is made up of folded-over portions of a strip of asbestos material in which a side flap of the full width of the enclosure is provided and end flaps of half the width are provided so as to, as shown in FIG. 34,

form an enclosure having a dual thickness of bottom wall as secured together, for example, by wire or metal staples 76.

FIGS. 18 to 23 are exemplary of a system E for continuously cooling and cleaning-off the upper reaches of refractory tile members 25 in a roof panel C, as well as radial hip panels B of a furnace roof construction. It will be noted that metal air duct cover members or assemblies 46 extend over the entire roof beneath the gooseneck hangers 12 and, at their transverse ends, may be directed downwardly and outwardly to discharge the dirt, debris and the warmed air. The system E is a fixed air duct system that may constitute a stationary or more or less permanent type in which spaced-apart blower fan units 61 and 61' are mounted as pairs about the structural framework and extend downwardly to deliver air longitudinally at spaced locations, substantially at mid positions, along the length of the furnace roof. Pipe or duct members 62 lead from the blowers 61 and 61 through air manifolds 60 and outflow or delivery air pipes or tubes 64 that are connected to inner closed ends of metal air duct cover assemblies 46.

As shown in FIG. 20, each metal duct or cover member 46 has a vertical side skirt or apron portion 46a that projects downwardly between side feet of hanger castings 20 to rest at their bottom edges on upper reaches of tile members 25. An inwardly projecting, horizontal, connecting portion 46b extends from the apron portion 46a along lower portions of the hangers 20, and an offset, vertically extending, boxlike portion 46c is connected thereto and extends over the hook portion 20a of one of the opposite hangers 20. The portion 460 extends downwardly along the inside of an adjacent side flange of an associated support channel 15 to, at its inner edge, rest on sealing material 47 carried within the channel 15 between its opposite flanges.

A tie wire 40 is shown at its ends secured tightly in position around the upper hook portions of opposed pairs of hanger castings 20 and at one end is secured in position by an angle-shaped mounting bracket 41. As shown in FIG. 20, an end loop of the wire 40 is secured by weld material to the bracket 41 within the connecting portion between its top and end flanges. As shown in FIG. 20, the bracket 41 is secured at its top flange under an end portion of the web of a support channel 15 by through-extending bolt and nut assemblies 42.

It will be seen that the cover member 46 of the ductwork cover the upper reaches of the refractory tile members 25 and provide an air flow spacing above upper reaches of the end faces of the tile members 25 and along the immediate parts of the metal support hanger members. Sealing tape 69 (see FIG. 21) may be used between joints of the cover members 46. The blowers or fans 61 and 61' may be employed continuously, if desired, to supply cooling air along the upper. reaches of the refractory tile. A periodic increased velocity movement of air may be employed when it is desired to blow dust from the covered or enclosed spacing or area.

FIG. 21 is further illustrative of the ductwork or enclosing cover construction 46 and shows seals between end portions of the members which may be taped. It also shows the use of wedge members 68 for clamping each section or member 46 in a down position. As shown in FIGS. 21, 22 and 23, the wedges 68 are adapted to extend through a hole portion 14c in the wing mounting part or plate 14 of each gooseneck hanger 12. In FIG. 23, a slightly modified form of cover or enclosing plate construction 70 is shown in which skirt or end portions 70a are formed separately from upper portions 70b and are secured together by bolt andnut assemblies 71.

FIGS. 24 to 27, inclusive, are illustrative of a modified form of cleaning assembly or construction wherein removable blow lances 45 may be located at longitudinally spaced positions along the length of the mid portion of the furnace A for supplying dust removing air when hinged cover assemblies and N are in the solid line down positions of FIG. 24. As shown, each side half of the furnace has a pair of hinged cover members N and 0. See connecting hinge lugs 50 and pivot pins 51. Lifting rods 52 have their lower ends mounted by pivot pins 54 on eye lugs 53 that extend from and are secured to the cover members 0 and N. The rods 52 extend from each cover member 0 and N upwardly and are, at their upper ends, tied-in a pivoted relation together by a cross-extending bar or bail member 55. As shown, the bail member 55 may be moved from its line position of FIG. 24 to its dot and dash or upper and lid raising position of the same figure by any suitable means, such as an overhead hoist engaging withina centrally positioned eyelet 56.

Each blow lance 45 is provided with a pair of branch outlets 45a, one of which is directed or turned towards one side of the furnace underneath its ductwork, and the other is pointed or turned towards the other side thereof underneath its ductwork. Normally when the furnace is in operation, the lances 45 will be removed and the cover member assemblies 0 and N will be secured in their raised, upper dot and dash indicated positions.

FIGS. 35 and 36 illustrate a wall construction such as may be employed for the crotch portion of the exhaust duct M of FIGS. 1 and 2, and which includes a pair of vertically upwardly extending side wall parts Q that converge towards one end are connected together by a rounded or curvilinear vertical nose part P. The wall parts Q are shown as resting or mounted on a plant foundation S. In FIG. 36, refractory roof R for the exhaust port or gas venting uptake M may be of the previously described construction or may be constructed of removable sectionsor panels of any suitable conventional construction.

Vertically extending 'or upright l-beam members or buckstays 9 provide the basic outer members of the metal framework and are mounted at their lower ends on and extend upwardly from the foundation S. A metal base or post 8 extends upwardly through the foundation S and-serves as a positioning member for a main, vertical supporting, T-shaped structural member 80 for the nose part P. The upright member 80 is made up of two angle pieces 81 whose web portions are secured together in a spaced-relation utilizing a spacer piece or member 82 (see FIG. 35). At its lower end, the member construction 80 has a bottom'foot plate 85 provided with a downwardly extending central lug porjection 85a. The floor post 8 hasa top plate 8a that is provided with a central slotted portion 8b to receive the lug projection 85a and-thus, provide accurate alignment of the upright member 80 (see FIG. 36).

As shown particularly in FIG. 36, a nose lift wing member 84 extends from between the pieces 81 and is secured in position with respect thereto by bolt and nut assemblies 83. It will be noted that similar bolt and nut assemblies 83 secure the pieces 81 in their back-toback relationship in cooperation with the spacer piece 82. The wing member 84 has an eyelet or open portion 84a extending therethrough to receive the hook of an overhead crane for lifting the upright member 80 vertically into and out of position on the metal base or post member 8 of the foundation S. As will be hereinafter shown, the complete nose part P that is mounted on the base member 8 is adapted to be moved vertically into and out of position between the ends of converging vertical side wall parts Q by removing a portion of the roof R.

The wall parts Q, as particularly shown in FIGS. 37 to 40, have horizontally-extending and vertically spaced-apart channelmembers 90 that are secured at' their web portions to project outwardly from the buckstay I-beam members 9' to provide supports for hangermounted refractory tile member panels or assemblies.

An angle piece 91 is secured (see FIGS. 39 and 41), as by welding, to the top flange of each support channel 90 of the framework to serve as a latching-tongue for receiving an upper hook end portion 92a of a vertical Wall bracket or post hanger member 92 that is hung or latched to depend downwardly therefrom Each post hanger member 92 has a centrally positioned, vertically extending flange portion 92b that is adapted to beengaged by a pair of opposed mounting fingers 95a of hanger castings 95 (see FIGS. 39 and 42). Each hanger 95 may be of the general type shown in FIGS. 20 and 21 of US. Pat. No. 2,738,744, and has leg and feet portions that are adapted to fit within latching slots of refractory tile members 25' (also of the construction shown in the reference patent).

It will be noted from FIGS. 39 and 40 that the post hanger members 92 are capable of longitudinal adjusting movement'along their associated horizontally extending channel support member 90 and have a substantially vertically aligned relation and horizontally spaced-apart positioning along the framework of the side wall part Q. Each post hanger 92 has an inwardly, horizontally, projecting shelf or flange portion 92c at its lower end on which a pair of relatively short depth refractory filler tile members 100 are positioned to closeoff end spaces forwardly or'outwardly of a group of edgeamounted refractory tile members 101. In constructing the. refractory portion of each side wall Q, filler tile members of very short depth extent that have a horizontal length corresponding (as shown in FIG. 42) to the stacked width extent of a group of four edge tile members 101, rest on the bottom shelf or flange 920 of an associated post hanger 92.

Key hole refractory tile members 103 of rectangular shape and of a depth extent or of a length that corresponds to the length of the regular or main tile members 25' are positioned between the filler tile members 100 and the edge tile members l0l to close-off the end spacing between the shelf portions 92c of adjacent hanger post members 92. See particularly FIGS. 40 and 42. As shown in FIGS. 39 and 41, a metal corrugated expansion member or plate 102 is positioned between key hole tile members 103 and adjacent faces of regu- 'lar tile members 25' of the-wall part Q. As indicated in FIG. 36, the expansion plates 102 in effect define horizontal tiers of the refractory block or tile members. As shown in FIGS. 35 and 42, vertical spacing is provided between panel sections by means of a metal spacer strip 105 that, at one end, is turned-over to rest on the top face of an adjacent key hole tile 103 and, at its other end, is doubled-over to provide a retaining end wall for any suitable commercial filler material 106.

Referring particularly to FIG. 35, the nose part P is of the same general construction as the side wall parts Q but, of course, is provided with radial tile members 25", see the type illustrated in the reference U.S. Pat. No. 2,738,744. Radial hanger castings 95' (see FIGS. 37 and 38) are also the type illustrated for example in FIG. 2 of the reference patent. Instead of employing a conventional buckstay upright member such as 9', the nose part employs upright member 80 which has been previously described. Inner foot or flange portion 81a of each member or piece 81 of the upright member 80 have angle pieces 87 secured thereto at spaced vertical locations therealong to project inwardly therefrom at vertically spaced-apart locations that may correspond in extent to the spaced locations of the channel members 90 of the side wall parts Q. Post hangers 92' are adapted to latch with a welded-on vertical piece or member 88 on the upper flange 87b of each angle piece 87 and receive and carry hanger castings 95'. The flange 87b of each post hanger 87 has inclined or beveled corner portions 870 (see FIGS. 37 and 38) and the vertical corner pieces or members 88 are secured thereat. As shown in FIG. 35, short length channels 90 may be secured to extend from opposite sides of the upright member 80 in alignment with and in a nonsecured, corner-interfitting relation with ends of the channel members 90 of the wall parts Q.

The post hangers 92 are of substantially similar construction to the post hangers 92 of the side walls Q. As disclosed in FIG. 36, the panels or refractory tile member assemblies of the nose part P are preferably formed in a staggered relation from the standpoint of their horizontal separations with respect to adjacent panels of the side wall parts Q. In this connection, the post hanger supporting angle members or pieces 87 may have a different vertical positioning than the angles 91 of the side walls. The nose part P consisting of its refractory tile members 25" and its metal structural framework has been unitized, so that it can be lifted into and out of position with respect to the pair of side wall parts Q. It will be noted that the refractory tile members 25" of the nose part (see FIG. 35) are separated from corresponding tile members 25' of the wall parts by vertically extending metal separator members 105 and the sealing filling material 106.

I claim:

1. In an improved refractory wall-like furnace enclo sure for mounting on a supporting metal framework, an upright structural member, vertically spaced-apart and horizontally extending wall support members carried by said upright member, gooseneck hangers engaging said support members and projecting downwardly therefrom and in the spacing between adjacently positioned pairs of said support members, hanger castings carried by each of said gooseneck hangers, a group of refractory tile members carried by each of said hanger castings, each of said gooseneck hangers having a projecting bottom shelf portion, the shelf portions of horizontally adjacent gooseneck hangers being in a spacedapart relation with respect to each other, keyhole refractory tile members positioned in said spacing to close it off and provide an entry to said wall for maintenance aNd repair thereof, edge-mounted refractory tile members carried on said shelf portions of said gooseneck hangers, and refractory filler tile members positioned in front of said edge-mounted tile members to with said keyhole members and said groups of refractory tile members complete the closing-off of the supporting metal framework.

2. In an improved refractory enclosure as defined in claim 1 wherein an overhead hoist is provided for use.

therewith, said upright member having an upper end portion constructed for engagement by the overhead hoist, and said. wall construction being adapted to be lowered and raised into and out of position asa unit with said upright member.

3. In a furnace construction having a wall provided with an assembly of refractory tile members defining side wall parts thereof, spaced-apart vertical buckstays along each of said side wall parts providing an outer supporting portion thereof, horizontally crossextending channel members secured in a vertically spaced-apart relation on said buckstays and extending therebetween, vertical postlike hangers removably hooked over and suspended from each of said channel members, each said postlike hanger having a crossextending tile-member-supporting horizontal bottom flange, horizontally extending hanger castings mounted on and cooperating with each of said postlike hangers and having means for engaging within and removably supporting refractory tile members for holding them in an aligned assembly, filler tile members adapted to rest on said bottom flanges of said postlike hangers, closingoff end tile members cooperating with said filler tile members, and keyhole tile members cooperating with said filler and end tile members and positioned to closeoff spacing between said bottom flanges of said postlike hangers.

4.'In a furnace construction as defined in claim 3, said side wall parts having an opposed positioning with respect to and converging towards each other at one end of the construction, a nose part adapted to be positioned between said side wall parts at their converging ends for connecting them together, said nose part having a vertically upwardly extending main support member, postlike nose hangers mounted in a vertically extending and spaced-apart relation along said main support member, refractory nose tile members, nose hanger castings mounted on and cooperating with each of said postlike nose hangers and having means for engaging within and removably supporting said refractory nose tile members for holding them in an aligned assembly; and said main support member having means for raising and lowering said postlike nose hangers, said nose hanger castings and said refractory nose tile members while in an assembled and mounted relation with respect to each other.

5. In a furnace construction, a pair of vertically extending side wall parts made up of a supporting metal framework and of interfitting closing-off refractory tile members carried on the inside of the construction by said metal framework, a nose part adapted to cooperate with and close-off and conect the adjacent end portions of said pair of side wall parts; said nose part having its own individual nose supporting metal framework that interfits in a removable relation with respect to metal framework of said side wall parts, and having as semblies of refractory nose block members removably suspended from said nose supporting framework and interfltting with the refractory tile members of said side wall parts to close-off the inside of the furnace construction.

wherein an overhead hoist is provided, said means for lifting comprising an upright metal member that carries said metal framework and that has an upper end portion for engagement by the overhead hoist. 

1. In an improved refractory wall-like furnace enclosure for mounting on a supporting metal framework, an upright structural member, vertically spaced-apart and horizontally extending wall support members carried by said upright member, gooseneck hangers engaging said support members and projecting downwardly therefrom and in the spacing between adjacently positioned pairs of said support members, hanger castings carried by each of said gooseneck hangers, a group of refractory tile members carried by each of said hanger castings, each of said gooseneck hangers having a projecting bottom shelf portion, the shelf portions of horizontally adjacent gooseneck hangers being in a spaced-apart relation with respect to each other, keyhole refractory tile members positioned in said spacing to close it off and provide an entry to said wall for maintenance aNd repair thereof, edgemounted refractory tile members carried on said shelf portions of said gooseneck hangers, and refractory filler tile members positioned in front of said edge-mounted tile members to with said keyhole members and said groups of refractory tile members complete the closing-off of the supporting metal framework.
 2. In an improved refractory enclosure as defined in claim 1 wherein an overhead hoist is provided for use therewith, said upright member having an upper end portion constructed for engagement by the overhead hoist, and said wall construction being adapted to be lowered and raised into and out of position asa unit with said upright member.
 3. In a furnace construction having a wall provided with an assembly of refractory tile members defining side wall parts thereof, spaced-apart vertical buckstays alonG each of said side wall parts providing an outer supporting portion thereof, horizontally cross-extending channel members secured in a vertically spaced-apart relation on said buckstays and extending therebetween, vertical postlike hangers removably hooked over and suspended from each of said channel members, each said postlike hanger having a cross-extending tile-member-supporting horizontal bottom flange, horizontally extending hanger castings mounted on and cooperating with each of said postlike hangers and having means for engaging within and removably supporting refractory tile members for holding them in an aligned assembly, filler tile members adapted to rest on said bottom flanges of said postlike hangers, closing-off end tile members cooperating with said filler tile members, and keyhole tile members cooperating with said filler and end tile members and positioned to close-off spacing between said bottom flanges of said postlike hangers.
 4. In a furnace construction as defined in claim 3, said side wall parts having an opposed positioning with respect to and converging towards each other at one end of the construction, a nose part adapted to be positioned between said side wall parts at their converging ends for connecting them together, said nose part having a vertically upwardly extending main support member, postlike nose hangers mounted in a vertically extending and spaced-apart relation along said main support member, refractory nose tile members, nose hanger castings mounted on and cooperating with each of said postlike nose hangers and having means for engaging within and removably supporting said refractory nose tile members for holding them in an aligned assembly; and said main support member having means for raising and lowering said postlike nose hangers, said nose hanger castings and said refractory nose tile members while in an assembled and mounted relation with respect to each other.
 5. In a furnace construction, a pair of vertically extending side wall parts made up of a supporting metal framework and of interfitting closing-off refractory tile members carried on the inside of the construction by said metal framework, a nose part adapted to cooperate with and close-off and conect the adjacent end portions of said pair of side wall parts; said nose part having its own individual nose supporting metal framework that interfits in a removable relation with respect to metal framework of said side wall parts, and having assemblies of refractory nose block members removably suspended from said nose supporting framework and interfitting with the refractory tile members of said side wall parts to close-off the inside of the furnace construction.
 6. In a furnace construction as defined in claim 5, said nose framework having means for lifting said nose part as a unit out of and lower it downwardly into an interfitting closing-off position with respect to said pair of side wall parts.
 7. In a furnace construction as defined in claim 6 wherein an overhead hoist is provided, said means for lifting comprising an upright metal member that carries said metal framework and that has an upper end portion for engagement by the overhead hoist. 